Matplot
Matplot — 2D plot of a matrix using colors
Calling sequence
Matplot(a,[strf,rect,nax])
Matplot(a,<opt_args>)
Parameters
| a | : real matrix of size (n1,n2). |
| <opt_args> | : This represents a sequence of statements key1=value1, key2=value2,... where key1, key2,... can be one of the following: | rect | : sets the bounds of the plot. If this key is given and neither frameflag nor strf is given then the y character of strf is supposed to be 7. See below for value. | | nax | : sets the grids definition. If this key is given and neither axesflag nor strf is given then the z character of strf is supposed to be 1. See below for value. | | frameflag | : specifies how the frame of the plot is computed. The value is an integer ranging from 0 to 8. It corresponds to the y character of strf. See below. | | axesflag | : specifies what kind of axes are drawn around the plot. The value is an integer ranging from 0 to 5. It corresponds to the z character of strf. See below. |
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| strf | : is a string of length 3 "xyz". | default | The default is "081". | | x | : controls the display of captions. | x=0 | : no caption. | | x=1 | : captions are displayed. They are given by the optional argument leg. |
| | y | : controls the computation of the actual coordinate ranges from the minimal requested values. Actual ranges can be larger than minimal requirements. | y=0 | : no computation, the plot use the previus (or default) scale | | y=1 | : from the rect arg | | y=2 | : from the min/max of the x, y datas | | y=3 | : built for an isometric scale from the rect arg | | y=4 | : built for an isometric plot from the min/max of the x, y datas | | y=5 | : enlarged for pretty axes from the rect arg | | y=6 | : enlarged for pretty axes from the min/max of the x, y datas | | y=7 | : like y=1 but the previus plot(s) are redrawn to use the new scale | | y=8 | : like y=2 but the previus plot(s) are redrawn to use the new scale |
| | z | : controls the display of information on the frame around the plot. If axes are requested, the number of tics can be specified by the nax optional argument. | z=0 | : nothing is drawn around the plot. | | z=1 | : axes are drawn, the y=axis is displayed on the left. | | z=2 | : the plot is surrounded by a box without tics. | | z=3 | : axes are drawn, the y=axis is displayed on the right. | | z=4 | : axes are drawn centred in the middle of the frame box. | | z=5 | : axes are drawn so as to cross at point (0,0). If point (0,0) does not lie inside the frame, axes will not appear on the graph. |
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| rect | : This argument is used when the second character y of argument strf is 1, 3 or 5. It is a row vector of size 4 and gives the dimension of the frame: rect=[xmin,ymin,xmax,ymax]. |
| nax | : This argument is used when the third character z of argument strf is 1. It is a row vector with four entries [nx,Nx,ny,Ny] where nx (ny) is the number of subgraduations on the x (y) axis and Nx (Ny) is the number of graduations on the x (y) axis. |
Description
The entries of matrix int(a) are used as colormap entries in
the current colormap. The color associated to a(i,j) is used
do draw a small square of length 1 with center at location
(x=j,y=(n1-i+1)).
Enter the command Matplot() to see a demo.
Examples
Matplot([1 2 3;4 5 6])
// draw the current colormap
Matplot((1:xget("lastpattern")))
See also
colormap, plot2d, Matplot1
